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en.wikipedia.org/wiki/Octagon

In geometry, an octagon is an eight-sided polygon or 8-gon. A regular octagon has Schläfli symbol {8} ...

www.coolmath.com/reference/polygons-08-octagons

Properties of octagons, interior angles of octagons Polygons: Properties of ... To find the sum of the interior angles of an octagon, divide it up into triangles.

www.tutorvista.com/content/math/octagon

A polygon which has 8 sides is known as an octagon. It is a two-dimensional closed shape. The word "octagon" is made up of octa + gonia which are Greek ...

Octagons appear in real life in all sorts of places: architecture, engineering, and even nature. In this lesson, explore the properties of an octagon, learn how to ...

www.mathsisfun.com/geometry/octagon.html

An octagon is an 8-sided polygon (a flat shape with straight sides). First, have a play ... A convex octagon has no angles pointing inwards. ... octagon properties.

www.mathsisfun.com/geometry/regular-polygons.html

Example: What is the exterior angle of a regular octagon? An octagon has 8 ... ( Not all polygons have those properties, but triangles and regular polygons do).

www.bbc.co.uk/schools/gcsebitesize/maths/geometry/polygonsrev4.shtml

Angle properties of polygons. In your exam, you might be asked to ... What is the sum of the interior angles of an octagon? toggle answer. Answer. Did you get ...

www.mathopenref.com/octagon.html

... dragging any orange dot. By clicking on the top left command line, you can switch it between a regular and irregular octagon. ... Properties of regular octagons ...